<template>
    <div class="base-b">
      <div>我是B组件（发布方）</div>
      <button @click="sMsg">发送消息</button>
    </div>
  </template>
  
  <script>
  import Bus from '../utils/EventBus'
  export default {
    methods:{
        sMsg(){
            Bus.$emit('sendMsg','欢迎来到黑马学前端')
        }
    }
  }
  </script>
  
  <style scoped>
  .base-b {
    width: 200px;
    height: 200px;
    border: 3px solid #000;
    border-radius: 3px;
    margin: 10px;
  }
  </style>